1 Standard Atmosphere = 101325 Pascals (SI Pressure Unit)
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Pressure unit (1 atm = sea-level atmospheric pressure) | Used for meteorology, aviation, physics
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atm → Pa: Pa = atm × 101325
Pa → atm: atm = Pa × 9.8692326671601E-6
The conversion factor is a defined international standard: 1 Standard Atmosphere (atm) is legally defined as 101325 Pascals. This value corresponds to the average atmospheric pressure at sea level at 15°C, standardized for consistency across scientific, engineering, and meteorological applications.
- Standard Atmosphere (atm): Intuitive for atmospheric pressure (e.g., weather reports, aviation altitude pressure references, everyday pressure discussions)
- Pascal (Pa): SI base unit for pressure, used in scientific research, engineering calculations, and global metric system applications (often scaled to kilopascals (kPa) for convenience: 1 kPa = 1000 Pa)
Using the standard conversion factor: 15 atm × 101325 Pa/atm = 1519875 Pa. This matches the reference example and confirms the accuracy of the conversion formula. For reverse verification, 1519875 Pa ÷ 101325 Pa/atm = 15 atm.
Key cross-unit relationships: 1 atm = 101325 Pa = 101.325 kPa = 760 mmHg (Torr) = 14.6959 psi. These conversions are critical for international collaboration, as different fields may use different pressure units (e.g., psi in US industry, mmHg in medicine, Pa in science).
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